The USB bus will add additional overhead, so the raw USB traffic will have higher volume than the network traffic, even if the only active USB devices on the system are network adapters. the network device for "normal" network packets.the USB device for raw USB traffic (if supported).Ethernet packets) and provides a network interface that looks like an ordinary network interface. The operating system "converts" the raw USB packets into the network traffic (e.g. Is it as simple as.A special case are network interfaces connected to a host computer through an USB cable.
I'm just failing to see how this is working. I've read a number of different examples on in, out, transfer packets. IRP information: 0x00, Direction: FDO -> PDO The request that is referenced: Frame 32618: 27 bytes on wire (216 bits), 27 bytes captured (216 bits) on interface wireshark_extcap1928, id 0Īrrival Time: 14:02:24.732615000 Eastern Daylight Time IRP information: 0x01, Direction: PDO -> FDO URB Function: URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER (0x0009) IRP USBD_STATUS: USBD_STATUS_SUCCESS (0x00000000) Frame 32625: 91 bytes on wire (728 bits), 91 bytes captured (728 bits) on interface wireshark_extcap1928, id 0Įncapsulation type: USB packets with USBPcap header (152)Īrrival Time: 14:02:24.741579000 Eastern Daylight Time So I believe I am having trouble understanding how the URBs are working. Wireshark says the request is in an earlier sequence- but I am not understanding where in that particular request is the actual 'request'. This one capture contains the sequence 02010c, which tells me the firmware version of a particular target. I have captured via Wireshark some data and am attempting to understand it as well as the communication protocol for USB.
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